NEC POWERMATE VP Manual page 185

6-70 Adding Options
Plug the other end of the cable into a properly grounded
6.
wall outlet.
To operate your speakers, turn on your audio source.
Push the power button on the back of the speakers to
1.
ON.
Turn the volume control on the front of the speakers to
2.
the desired level.
Set the Bass Boost switch (DXBB) on the front of the
3.
speakers to the desired level.
Connecting speaker components